5		1
				5
			7	2		5	6
6			8			3
	7			4			1
5	1		4	7
			2
		1		3

Difficulty: Super easy (0)

7	2				4
1		4
	6	5			1
		2					8
6					7
		7			3	8
					8		7
		8				5	4

Difficulty: Super easy (0)

					2	8
			8		3	6
	5				7
7
							7
		1				2
	3	5		2
	2	7

Difficulty: Easy (0)

	3		2	1			7
						3
3		2		8
7
							8
			7		4		6
	2
1			8	4		6

Difficulty: Very easy (0)